Nagano weather in September (Nagano, Japan)

What should you pack for a trip to Nagano in September? Curious if the timing is right for your trip? Our page offers an in-depth look at the monthly weather conditions.

Temperatures

September in Nagano generally includes high temperatures and heavy rainfall. September is a notable month of the summer season. You can expect daytime temperatures to reach around 24°C, while the nights will see a decline to about 15°C.

Precipitation

Nagano in September falls under the rainy season with heavy rainfall, averaging around 219 mm for the month. Records from the past 30 years suggest that around 20 days will experience rain.

Average sunshine

The area enjoys a balanced 142 hours of sunlight, ensuring it's neither too overcast nor too sunny.

If you prefer dry days with pleasant temperatures, May typically offers the best circumstances. While January, February, March, July, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Nagano climate page with graphs.

 

Nagano, monthly averages in September

Min Temperature 15°C  

Max Temperature 24°C  

Chance of Rain 65%  

Precipitation 219 mm  

Rainy days 20 days  

Humidity 74%  

Sunshine 142 hours  

Percentage Sunshine  

Where to go in Japan in September

Find out more about the weather in Japan and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Nagano, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Camping

6/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Nagano.

Our site offers climate and forecast data for every country in the world. Are you going to Japan? On this website you can find historical weather averages for many cities in Japan. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.